<title>「一本通 5.4 练习 2」炮兵阵地</title><link href="http://hzoi.com/tomorrow.css" rel="stylesheet"><div class="ui existing segment"><pre><code><span class="pl-cp">#include</span> <span class="pl-cpf">&lt;bits/stdc++.h&gt;</span><span class="pl-cp"></span>
<span class="pl-k">using</span> <span class="pl-k">namespace</span> <span class="pl-n">std</span><span class="pl-p">;</span>
<span class="pl-kt">int</span> <span class="pl-n">n</span><span class="pl-p">,</span> <span class="pl-n">m</span><span class="pl-p">,</span> <span class="pl-n">F</span><span class="pl-p">[</span><span class="pl-mi">105</span><span class="pl-p">],</span> <span class="pl-n">f</span><span class="pl-p">[</span><span class="pl-mi">105</span><span class="pl-p">][</span><span class="pl-mi">66</span><span class="pl-p">][</span><span class="pl-mi">66</span><span class="pl-p">],</span> <span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-mi">70</span><span class="pl-p">],</span> <span class="pl-n">cnt</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">,</span> <span class="pl-n">gs</span><span class="pl-p">[</span><span class="pl-mi">200</span><span class="pl-p">];</span>  
<span class="pl-kt">bool</span> <span class="pl-n">mp</span><span class="pl-p">[</span><span class="pl-mi">105</span><span class="pl-p">][</span><span class="pl-mi">30</span><span class="pl-p">];</span>
<span class="pl-kt">int</span> <span class="pl-nf">main</span><span class="pl-p">()</span> <span class="pl-p">{</span>
    <span class="pl-n">cin</span> <span class="pl-o">&gt;&gt;</span> <span class="pl-n">n</span> <span class="pl-o">&gt;&gt;</span> <span class="pl-n">m</span><span class="pl-p">;</span>
    <span class="pl-kt">char</span> <span class="pl-n">a</span><span class="pl-p">;</span>
    <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;=</span> <span class="pl-n">n</span><span class="pl-p">;</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span> <span class="pl-p">{</span>
        <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">j</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">j</span> <span class="pl-o">&lt;=</span> <span class="pl-n">m</span><span class="pl-p">;</span> <span class="pl-n">j</span><span class="pl-o">++</span><span class="pl-p">)</span> <span class="pl-p">{</span>
            <span class="pl-n">cin</span> <span class="pl-o">&gt;&gt;</span> <span class="pl-n">a</span><span class="pl-p">;</span>
            <span class="pl-k">if</span> <span class="pl-p">(</span><span class="pl-n">a</span> <span class="pl-o">==</span> <span class="pl-sc">&#39;H&#39;</span><span class="pl-p">)</span> <span class="pl-n">mp</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">][</span><span class="pl-n">j</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span>  
        <span class="pl-p">}</span>
    <span class="pl-p">}</span>
    <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;=</span> <span class="pl-n">n</span><span class="pl-p">;</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span>
        <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">j</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">j</span> <span class="pl-o">&lt;=</span> <span class="pl-n">m</span><span class="pl-p">;</span> <span class="pl-n">j</span><span class="pl-o">++</span><span class="pl-p">)</span>
            <span class="pl-n">F</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-p">(</span><span class="pl-n">F</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">&lt;&lt;</span> <span class="pl-mi">1</span><span class="pl-p">)</span> <span class="pl-o">+</span> <span class="pl-n">mp</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">][</span><span class="pl-n">j</span><span class="pl-p">];</span>
    <span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-o">++</span><span class="pl-n">cnt</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">;</span>
    <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;</span> <span class="pl-p">(</span><span class="pl-mi">1</span> <span class="pl-o">&lt;&lt;</span> <span class="pl-n">m</span><span class="pl-p">);</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span> <span class="pl-p">{</span>
        <span class="pl-k">if</span> <span class="pl-p">(</span><span class="pl-n">i</span> <span class="pl-o">&amp;</span> <span class="pl-p">(</span><span class="pl-n">i</span> <span class="pl-o">&lt;&lt;</span> <span class="pl-mi">1</span><span class="pl-p">)</span> <span class="pl-o">||</span> <span class="pl-n">i</span> <span class="pl-o">&amp;</span> <span class="pl-p">(</span><span class="pl-n">i</span> <span class="pl-o">&lt;&lt;</span> <span class="pl-mi">2</span><span class="pl-p">)</span> <span class="pl-o">||</span> <span class="pl-n">i</span> <span class="pl-o">&amp;</span> <span class="pl-p">(</span><span class="pl-n">i</span> <span class="pl-o">&gt;&gt;</span> <span class="pl-mi">1</span><span class="pl-p">)</span> <span class="pl-o">||</span><span class="pl-n">i</span> <span class="pl-o">&amp;</span> <span class="pl-p">(</span><span class="pl-n">i</span> <span class="pl-o">&gt;&gt;</span> <span class="pl-mi">2</span><span class="pl-p">))</span> <span class="pl-k">continue</span><span class="pl-p">;</span>  
        <span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-o">++</span><span class="pl-n">cnt</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-n">i</span><span class="pl-p">;</span>  
        <span class="pl-kt">int</span> <span class="pl-n">x</span> <span class="pl-o">=</span> <span class="pl-n">i</span><span class="pl-p">;</span>
        <span class="pl-k">while</span> <span class="pl-p">(</span><span class="pl-n">x</span><span class="pl-p">)</span> <span class="pl-p">{</span>  
            <span class="pl-n">gs</span><span class="pl-p">[</span><span class="pl-n">cnt</span><span class="pl-p">]</span><span class="pl-o">++</span><span class="pl-p">;</span>
            <span class="pl-n">x</span> <span class="pl-o">-=</span> <span class="pl-p">(</span><span class="pl-n">x</span> <span class="pl-o">&amp;</span> <span class="pl-p">(</span><span class="pl-o">-</span><span class="pl-n">x</span><span class="pl-p">));</span>
        <span class="pl-p">}</span>
    <span class="pl-p">}</span>
    <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;=</span> <span class="pl-n">cnt</span><span class="pl-p">;</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span>
        <span class="pl-k">if</span> <span class="pl-p">(</span><span class="pl-o">!</span><span class="pl-p">(</span><span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">&amp;</span> <span class="pl-n">F</span><span class="pl-p">[</span><span class="pl-mi">1</span><span class="pl-p">]))</span> 
            <span class="pl-n">f</span><span class="pl-p">[</span><span class="pl-mi">1</span><span class="pl-p">][</span><span class="pl-n">i</span><span class="pl-p">][</span><span class="pl-mi">0</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-n">gs</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">];</span>
    <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;=</span> <span class="pl-n">cnt</span><span class="pl-p">;</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span>
        <span class="pl-k">if</span> <span class="pl-p">(</span><span class="pl-o">!</span><span class="pl-p">(</span><span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">&amp;</span> <span class="pl-n">F</span><span class="pl-p">[</span><span class="pl-mi">2</span><span class="pl-p">]))</span>
            <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">j</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">j</span> <span class="pl-o">&lt;=</span> <span class="pl-n">cnt</span><span class="pl-p">;</span> <span class="pl-n">j</span><span class="pl-o">++</span><span class="pl-p">)</span>
                <span class="pl-k">if</span> <span class="pl-p">(</span><span class="pl-o">!</span><span class="pl-p">(</span><span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">&amp;</span> <span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">])</span> <span class="pl-o">&amp;&amp;</span> <span class="pl-o">!</span><span class="pl-p">(</span><span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">]</span> <span class="pl-o">&amp;</span> <span class="pl-n">F</span><span class="pl-p">[</span><span class="pl-mi">1</span><span class="pl-p">]))</span>
                    <span class="pl-n">f</span><span class="pl-p">[</span><span class="pl-mi">2</span><span class="pl-p">][</span><span class="pl-n">i</span><span class="pl-p">][</span><span class="pl-n">j</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-n">gs</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">]</span> <span class="pl-o">+</span> <span class="pl-n">gs</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">];</span>
    <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">3</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;=</span> <span class="pl-n">n</span><span class="pl-p">;</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span>
        <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">j</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">j</span> <span class="pl-o">&lt;=</span> <span class="pl-n">cnt</span><span class="pl-p">;</span> <span class="pl-n">j</span><span class="pl-o">++</span><span class="pl-p">)</span>
            <span class="pl-k">if</span> <span class="pl-p">(</span><span class="pl-o">!</span><span class="pl-p">(</span><span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">]</span> <span class="pl-o">&amp;</span> <span class="pl-n">F</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]))</span>
                <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">k1</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">k1</span> <span class="pl-o">&lt;=</span> <span class="pl-n">cnt</span><span class="pl-p">;</span> <span class="pl-n">k1</span><span class="pl-o">++</span><span class="pl-p">)</span>
                    <span class="pl-k">if</span> <span class="pl-p">(</span><span class="pl-o">!</span><span class="pl-p">(</span><span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">]</span> <span class="pl-o">&amp;</span> <span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">k1</span><span class="pl-p">])</span> <span class="pl-o">&amp;&amp;</span> <span class="pl-o">!</span><span class="pl-p">(</span><span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">k1</span><span class="pl-p">]</span> <span class="pl-o">&amp;</span> <span class="pl-n">F</span><span class="pl-p">[</span><span class="pl-n">i</span> <span class="pl-o">-</span> <span class="pl-mi">1</span><span class="pl-p">]))</span>
                        <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">k2</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">k2</span> <span class="pl-o">&lt;=</span> <span class="pl-n">cnt</span><span class="pl-p">;</span> <span class="pl-n">k2</span><span class="pl-o">++</span><span class="pl-p">)</span>
                            <span class="pl-k">if</span> <span class="pl-p">(</span><span class="pl-o">!</span><span class="pl-p">(</span><span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">]</span> <span class="pl-o">&amp;</span> <span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">k2</span><span class="pl-p">])</span><span class="pl-o">&amp;&amp;</span> <span class="pl-o">!</span><span class="pl-p">(</span><span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">k1</span><span class="pl-p">]</span> <span class="pl-o">&amp;</span> <span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">k2</span><span class="pl-p">])</span> <span class="pl-o">&amp;&amp;</span> <span class="pl-o">!</span><span class="pl-p">(</span><span class="pl-n">start</span><span class="pl-p">[</span><span class="pl-n">k2</span><span class="pl-p">]</span> <span class="pl-o">&amp;</span> <span class="pl-n">F</span><span class="pl-p">[</span><span class="pl-n">i</span> <span class="pl-o">-</span> <span class="pl-mi">2</span><span class="pl-p">]))</span>
                                <span class="pl-n">f</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">][</span><span class="pl-n">j</span><span class="pl-p">][</span><span class="pl-n">k1</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-n">max</span><span class="pl-p">(</span><span class="pl-n">f</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">][</span><span class="pl-n">j</span><span class="pl-p">][</span><span class="pl-n">k1</span><span class="pl-p">],</span><span class="pl-n">f</span><span class="pl-p">[</span><span class="pl-n">i</span> <span class="pl-o">-</span> <span class="pl-mi">1</span><span class="pl-p">][</span><span class="pl-n">k1</span><span class="pl-p">][</span><span class="pl-n">k2</span><span class="pl-p">]</span> <span class="pl-o">+</span> <span class="pl-n">gs</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">]);</span>
    <span class="pl-kt">int</span> <span class="pl-n">ans</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">;</span>
    <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;=</span> <span class="pl-n">cnt</span><span class="pl-p">;</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span>
        <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">j</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">j</span> <span class="pl-o">&lt;=</span> <span class="pl-n">cnt</span><span class="pl-p">;</span> <span class="pl-n">j</span><span class="pl-o">++</span><span class="pl-p">)</span>
            <span class="pl-n">ans</span> <span class="pl-o">=</span> <span class="pl-n">max</span><span class="pl-p">(</span><span class="pl-n">ans</span><span class="pl-p">,</span> <span class="pl-n">f</span><span class="pl-p">[</span><span class="pl-n">n</span><span class="pl-p">][</span><span class="pl-n">i</span><span class="pl-p">][</span><span class="pl-n">j</span><span class="pl-p">]);</span>
    <span class="pl-n">cout</span> <span class="pl-o">&lt;&lt;</span> <span class="pl-n">ans</span><span class="pl-p">;</span>
<span class="pl-p">}</span>
</cpde></pre></div>